文件名称:pcm
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一。产生长度为500的零均值,单位方差的高斯随机变量序列,用均匀pcm的方法用16电平进行量化:1)求所得的SQNR,该序列的前5个值,相应的量化值和相应的码字。2)画出量化误差(定义为输入值和量化值之间的差),同时 画出量化值作为输入值的函数的图。3)用128量化电平数重做2)题, 比较结果。
二。产生一个长度为500,按N(O,1)分布的随机变量序列,分别用16,128量化电平数和u=255的u律非线性进行量化,画出每种情况下量化器的误差和输入-输出关系,并求SQNR.
三。长度为500的非平稳序列a由两部分组成:前20个样本是按照均值为零和方差为400的高斯随机变量产生的,其余480个样本是根据均值和方差为1的高斯随机变量产生的,对这个序列分别用均匀pcm和非均匀pcm方法进行128电平量化,试比较两种情况下所得到的SQNR。
-One. Have a length of 500 zero mean, unit variance Gaussian random variables with uniform pcm way to quantify the level with a 16: 1) Find the income SQNR, the sequence of the first 5 values, the corresponding quantization value and the corresponding codeword. 2) Draw the quantization error (defined as the input value and quantify the difference between the values), and draw quantitative values as a function of input graph. 3) redo 128 the number of quantization level 2) title, compare the results.
II. Produce a length of 500, according to N (O, 1) distributed random variables, respectively 16,128 and the number of quantization level of u u = 255 to quantify non-linear law, draw each case quantizer error and input- output relationships, and seek SQNR.
III. Length of the non-stationary series is a 500 consists of two parts: the first 20 samples in accordance with zero mean and variance of 400 generated Gaussian random variable, and the remaining 480 samples are based o
二。产生一个长度为500,按N(O,1)分布的随机变量序列,分别用16,128量化电平数和u=255的u律非线性进行量化,画出每种情况下量化器的误差和输入-输出关系,并求SQNR.
三。长度为500的非平稳序列a由两部分组成:前20个样本是按照均值为零和方差为400的高斯随机变量产生的,其余480个样本是根据均值和方差为1的高斯随机变量产生的,对这个序列分别用均匀pcm和非均匀pcm方法进行128电平量化,试比较两种情况下所得到的SQNR。
-One. Have a length of 500 zero mean, unit variance Gaussian random variables with uniform pcm way to quantify the level with a 16: 1) Find the income SQNR, the sequence of the first 5 values, the corresponding quantization value and the corresponding codeword. 2) Draw the quantization error (defined as the input value and quantify the difference between the values), and draw quantitative values as a function of input graph. 3) redo 128 the number of quantization level 2) title, compare the results.
II. Produce a length of 500, according to N (O, 1) distributed random variables, respectively 16,128 and the number of quantization level of u u = 255 to quantify non-linear law, draw each case quantizer error and input- output relationships, and seek SQNR.
III. Length of the non-stationary series is a 500 consists of two parts: the first 20 samples in accordance with zero mean and variance of 400 generated Gaussian random variable, and the remaining 480 samples are based o
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